最近五、六年来,在稀土工业中发生了根本的变化。稀土元素的技术应用的领域和范围扩大了,稀土元素在钢铁冶金和特殊合金中获得了特别的地位,在军事和原子技术中出具有重要的意义。许多国家都以很快的速度来发展稀土原料的开采和化学冶金方面的稀土产品的生产。开始了各种新型矿石的开采和许多新型化合物的生产。最主要的是,出现了一个新的趋 In the last five or six years, fundamental changes have taken place in the rare earth industry. Rare earth elements in the field of application of technology and scope expanded, rare earth elements in steel metallurgy and special alloys gained a special position in the military and atomic technology has an important significance. Many countries are developing very rapidly the production of rare earth raw materials and the production of rare earth products in chemical metallurgy. Began a variety of new ore mining and the production of many new compounds. Most importantly, a new trend has emerged